Explain the raster scan monitors, Computer Engineering

Assignment Help:

Explain the raster scan monitors

The refresh process must also be performed for raster scan monitors. Most television monitors are raster scan display devices : one scan-line at a time. Raster scan systems uses a memory buffer called frame buffer (or refresh buffer) in which the intensities of the pixels are stored. Refreshing the screen is performed using the information (intensity of each pixel) stored in the frame buffer. Frame buffer can be treated as a two-dimensional array. Raster display devices read the frame buffer and activate the three phosphor dots in the triad according to the value read from the frame buffer.

The entire contents of the frame buffer should be read and the pixels should be activated appropriately at a sufficiently high rate to avoid flickering of the picture. Depending on the persistence of the phosphor coated inside the screen, the monitors require different refresh rates. In some raster display devices, a frame buffer is displayed in two passes. This kind of refreshing is called interlaced. In the first pass the odd rows are refreshed, while the even rows are refreshed in the second pass. Thus, the screen is refreshed in half the time. Though this approach does not really increase the rate of refreshing the screen, but is quite effective in reducing the flicker.

 


Related Discussions:- Explain the raster scan monitors

What is optical mark recognition, Optical mark recognition (OMR)  OMR ...

Optical mark recognition (OMR)  OMR technology scans a printed form and reads pre-defined positions (where specific fields have been filled in for instance ?-?or _); system re

show bank type , Describe an abstract class 'Bank' having abstract methods...

Describe an abstract class 'Bank' having abstract methods as 'CreateAccount' 'depositAmount' & 'withDrawAmount'.Add method definitions for 'CalculateInterest' and 'SetInterest' as

Magnetic storage - computer architecture, Magnetic storage - computer archi...

Magnetic storage - computer architecture: Magnetic storage uses different type of patterns of magnetization on a magnetically coated surface to store information. Magnetic sto

Which rule is used for the expansion of nested macro calls, The expansion ...

The expansion of nested macro calls done by using of? Ans. LIFO rule is used for the expansion of nested macro calls.

Explain the working of a demultiplexer, Explain the working of a demultiple...

Explain the working of a demultiplexer with the help of an example. Ans: 1:4 Demultiplexer: Fig.(a) demonstrates the logic circuit of a 1:4 demultiplexer. This has two NOT

Computer architecture basics, Computer Architecture Basics: Some of co...

Computer Architecture Basics: Some of computer architecture at companies such like AMD and Intel uses more fine distinctions: Macro architecture- this is an architectura

A subroutine can be terminated unconditionally using exit, A subroutine can...

A subroutine can be terminated unconditionally using EXIT. True.

Doubly linked list than by singly linked list, Which operations is performe...

Which operations is performed more efficiently by doubly linked list than by singly linked list Deleting a node whose location is given.

Define the three prime processes of UML, Define the three prime processes o...

Define the three prime processes of uml The three prime processes were OMT (Rumbaugh), OOSE (Jacobson) and Booch. OMT was strong in analysis, while Booch was strong in design a

Over fitting considerations - artificial intelligence, Over fitting Conside...

Over fitting Considerations - artificial intelligence Left  unexamined ,  back  propagation  in  multi-layer  networks  may  be very susceptible  to over fitting itself to the

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd